ASACORE-1022 About Feature - Check AboutData before announcing

Since any user can provide there own AboutDataListener we must check that
the MsgArg returned from the GetAboutData and GetAnnouncedAboutData contain
all the required fields.

Change-Id: Iaeb10e769db21bef0238e9f79c6a17e0c91ac6de
Signed-off-by: George Nash <georgen@qce.qualcomm.com>